Limiting Wi-Fi Requests on Xiaomi: Causes, Consequences and Remedies

Have you ever encountered a situation where your Xiaomi smartphone or Mi Router suddenly stops connecting to Wi-Fi, even though the password is entered correctly and the Internet on other devices works? And the mysterious message can appear in the router's logs or system notifications: "Exceeded the restriction of requests" or "too many requests." This problem is most often associated with the network congestion protection mechanism that Xiaomi has integrated into its devices, but why it occurs and how to solve it, we will understand in detail.

Wi-Fi request restriction is not a bug, but a security feature designed to prevent DoS attacks or overloading a router, but sometimes it works falsely: For example, when you are actively using torrents, online games or connecting a large number of smart devices (lamps, sensors, cameras), in this article we will explain how this mechanism works on different Xiaomi devices – from smartphones to smartphones. MIUI router-to-way 4A/AC2100, We also provide step-by-step instructions for setting up and circumventing restrictions.

What is Wi-Fi Request Limitation and Why It Appears

The term “request limitation” (or Request Limit) means that a device — whether a smartphone or a router — blocks a network connection because of the excess of the permissible number of network requests per unit of time.

• 📱 On the smartphone side: MIUI Limits the number of Wi-Fi connection attempts if they appear suspicious (for example, when switching or switching access points frequently).
• 📡 On the router side: Mi Router blocks IP-Device address if it sends too many packets (e.g., in a network scan or DDoS attack).

The main reasons for the limitation:

• 🔄 Frequent change of Wi-Fi networks (for example, when moving between access points in the shopping center).
• 🎮 Games or applications with heavy network traffic (for example, PUBG Mobile, Genshin Impact or torrents).
• 🏠 A large number of smart devices on the network (Yeelight lamps, Mi Home cameras, robot vacuum cleaners).
• 🔍 Network scanning with applications like Fing or WiFi Analyzer.
• 🛡️ Attacks on a router (if someone tries to find a password or overload the network).

In most cases, the restriction is temporary: after 5 to 30 minutes, the lock is automatically removed, but if the problem recurs regularly, it should be addressed at the level of settings.

How the restriction of requests manifests itself on Xiaomi smartphones (MIUI)

On smartphones Xiaomi, Redmi or POCO firmware MIUI Restriction of requests may be manifested in the following ways:

• ❌ Unable to connect to Wi-Fi: Password entered correctly, but network "does not respond" or gives an authentication error....
• ⚠️ Notification: Overdue connection attempts. Repeat later.
• 🔄 Automatic disconnection from the network a few seconds after connection.
• 📵 Disappearance of the network from the list of available (although it is on other devices).

The problem most often arises on versions. MIUI 12-14, where network activity was tightened:

• 🔄 The function “Smart connection” (Settings) → Wi-Fi → Additionally. → Smart connectivity that automatically switches between networks.
• 🛡️ Protection against fake access points (on by default in the MIUI 13+).
• 📱 Errors in the Wi-Fi module cache (especially after updates).

⚠️ Attention: If you are using VPN or proxy on a smartphone, MIUI can rate a frequent shift IP as suspicious activity and block the connection. VPN prediagnosis!

Before changing the settings, check:

Reboot your smartphone|Try connecting to another Wi-Fi network|Turn it off. VPN/proxy|Check if the aircraft mode is on.-->

Restriction of requests on Xiaomi routers (Mi Router)

On Xiaomi routers (series Mi Router) 4A, AC2100, AX3600 The restriction of requests works differently. Here the blocking occurs at the level of the IP-Addresses of the device if they exceed the limits:

• 📥 ICMP-Ping requests – more than 100 per minute.
• 🔌 TCP-Connections: More than 50 new connections per second.
• 🔄 ARP-requests (definition) MAC-Addresses: more than 30 per minute.

If the device exceeds these limits, the router adds it. IP blacklist for 5 to 30 minutes, signs of lockdown:

• 🚫 The device connects to Wi-Fi, but the Internet does not work (no access to sites, although the network indicator is active).
• ⚠️ In router logs (Settings) → Systemic tools → System logs appear, like records: [Firewall] Blocked IP 192.168.31.100 due to request flood
• 🔄 After restarting the router or changing IP The problem disappears.

Most often, the following are blocked:

⚠️ Note: If you have a device on your network that is permanently blacklisted (e.g, IP-A camera or server, that could indicate that it's infected with a virus!

How to remove the restriction of requests on the smartphone Xiaomi

If the problem occurs on your smartphone, try the following steps:

1. Resetting Wi-Fi settings

Often the error is associated with a damaged Wi-Fi cache to reset it:

1. Go to Settings. → Wi-Fi.
2. Click on the three dots in the upper right corner and select Additional.
3. Select Reset Wi-Fi settings (or Network Reset in new versions) MIUI).
4. Confirm the action and restart the smartphone.

2. Disabling the "Smart Connection"

Smart Connection automatically switches between networks, which can cause false alarms:

1. Open the settings → Wi-Fi → More.
2. Find the Smart Connection (or Auto Connection) option and turn it off.
3. Also, turn off the scanning is always available (if any).

3. Changes in regional settings

In some versions MIUI (especially global, restricting requests is tougher for regions with high levels of cyberattacks (e.g. China, Russia, India) to get around this:

1. Go to Settings. → Additionally. → Region.
2. Choose a country with less stringent restrictions (e.g., the United States or Germany).
3. Reboot your smartphone.

4. Firmware update

Old versions. MIUI (before 12.5) there were bugs with processing network requests:

1. Open Settings → About the phone → System update.
2. If an update is available, install it.
3. After the update, reset the network settings (Settings) → Memory. → Resetting settings → Resetting network settings).

💡

If Wi-Fi still doesn't work after resetting, try connecting to the hotspot mode from another device, and if the Internet works, the problem is precisely the settings of the smartphone, not the router.

Set up Xiaomi router to remove restrictions

If the lock is at the router level, you need to change the settings of its protection.

1.Access to the control panel

Open the router's web interface:

1. Connect to the router network via Wi-Fi or cable.
2. Enter 192.168.31.1 (or miwifi.com for new models) in your browser.
3. Log in (the default login and password is usually admin + password from the sticker on the router).

2. Disabling the restriction of requests

Depending on the router model, the path to settings may differ. 4A/AC2100:

1. Go to the Supplementary → Security → Protection from attacks.
2. Turn off the options: 🛡️ Protection against DoS attacks 🔄 Limitation ICMP-request 📥 Packet filtering

Save the settings and restart the router.

For advanced users: If your router has access to SSH, You can manually increase your request limits. 3G team will do:

nvram set attack_prevent=0


nvram commit




reboot

⚠️ Warning: Disabling attack protection makes routers vulnerable! Use this method only if you are confident in the security of your network.

3. Adding devices to the whitelist

If a particular device is blocked (e.g., a game console or a game console) IP-camera, add it MAC-exception:

1. Find it. MAC-the address of the problem device (usually indicated on the sticker or network settings).
2. In the router panel, go to Additional → Access control.
3. Add a new rule with MAC-Device address and permission to always allow.

4. Router firmware update

Older versions of the Mi Router firmware had bugs with packet processing.

1. In the control panel, go to System Tools → Firmware update.
2. If a new version is available, install it.
3. After the update, reset settings (System Tools) → Factory settings).

To set up:

1. In the router panel, go to Additional → VPN.
2. Select the protocol (OpenVPN or WireGuard) and enter data from your VPN-provider.
3. Activate. VPN and check the connection.

2. Static IP configuration

If your device is permanently blacklisted, assign it a static IP locally:

1. In the router panel, go to DHCP → Reservation of addresses.
2. Add in. MAC-Address of the device and assign it a fixed IP (for example, 192.168.31.100).
3. Save the settings and restart the router.

3. Use of alternative firmware

For advanced users, firmware like OpenWRT or Padavan allows you to flexibly adjust your query limits.

• ⚠️ Guarantee on the router will burn after installing custom software.
• 🔧 Technical knowledge is required to adjust.
• 📡 Not all features of the original software will work (e.g. Mi Home integration).

If you do decide, follow the instructions for your router model on the forums. 4PDA Xiaomi Community.

4. Separation of the network into VLAN

For smart homes with a large number of devices, you can divide the network into virtual subnets (VLAN):

• 🏠 The main network - for smartphones, laptops, TV.
• 💡 Guest network - for smart lamps, sensors, cameras.
• 🎮 Gaming network – for consoles and PCs with high traffic.

This will reduce the load on the main channel and reduce the risk of triggering restrictions.

FAQ: Answers to Frequent Questions